a = 13
b = 7
print(f"a+b={a+b}")
print(f"a-b={a-b}")
print(f"a*b={a*b}")
print(f"a/b={a/b}")
print(f"a%b={a%b}")
print(f"a//b={a//b}")
print(f"a**b={a**b}")
print('hello'+'world')
print('hello'*30)
stra = '-'*10
print(stra)

name='tyx'
age=23
print(f"my name is:{name},age is:{age}")